Manufacture of seamless felt tubes for covering rollers and the like.



PATENTED DEC. 3, 1907;

N. WAHL. MANUFACTURE OF SEA'MLESS FELT TUBES FOR GOVERING ROLLERS AND THE LIKE. APPLICATION FILED SEPT. 2, 1905.

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UNITED STATES PATENT OFFICE.

NIKOLAUS WAHL, OF KAHL-ON-THE-MAIN, GERMANY.

i MANUFACTURE OF SEAMLESS FELT TUBES FOR COVERING ROLLERS AND THE LIKE.

Specification of Letters Patent.

Patented. Dec. 3, 1907.

Application filed September 2. 1905. Serial No. 276,835.

To all whom it may concern:

Be it known that I, NIKOLAUS WAHL, manufacturer, a subject of the Empire of Germany, residing in Kahl-on-the-Main, in the Kingdom of Bavaria, Germany, have invented certain new and useful Improvements in the Manufacture of Seamless Felt Tubes for Covering Rollers and the Like, of which the following is a specification.

The manufacture of seamless felt tubes or envelops for covering rollers and the like has already been known for a considerable time in the felt-manufacturing industry, butthe coverings hitherto obtained have the disadvantage that as the woolen fibers always run in only one direction, they have not the same tensile strength in both longitudinal and transverse directions. This disadvantage has the result that in the course of time the coverings expand in the transverse direction so that they become of unequal thickness. The cause of this inconvenience is to be found in the fact that the woolen fibers used for production of the felt coverings lie all in one and the same direction owing to the use of whole slivers coming from the cards, and it will be easily understood that they must have a greater tensile strength in the axial direction of the fibers than in the transverse direction thereof.

The present invention relates to a method for the manufacture of seamless felt tubes or coverings which possess the same tensile strength both in their longitudinal and transverse directions. I

According to the present process the wide sliver coming from a carding machine is divided into narrow ribbon-like strips and these separate sliver-strips are then wound separately on a number of rollers used in the subsequent process as feed rollers. The subsequent part of the process for producing the seamless felt tubes from said sliverstrips will be understood by referring to the accompanying drawing which illustrates diagrammatically apparatus which may be conveniently used in carrying out the process.

One of the rollers 1 is placed on any suitable transport device such as a threaded sleeve 2 mounted on a screw spindle which sleeve is caused to move slowly to and fro in front of an endless transport cloth or traveling endless band 3 so that at the same time the sliver-strip 4 fed from the roller 1 is wound in a right handed or left handed helical or coiled form on said revolving transport cloth 3. When the winding has been carried out to the end of the cloth, the said ,transport device 2 is reversed by suitable means so that a re-winding of the sliverstrip 4 in the opposite direction is obtained on the transport-cloth, and as shown in the drawing a crossing of the helical sliver-strip layers is effected at each reversal of the transport device. This winding of the sliverstrip on to the transport cloth is continued until the strength to be obtained, after fulling the seamless felt covering, is insured. This winding process being finished, the sliver-strip thus obtained is first of all out along both sides or ends since owing to the oblique superposed winding of the different layers it is uneven at the edges, and then in the usual and known manner by means of suitable known fulling devices it is subjected to the fulling which unites the cross-lying super osed woolen fibers, so that they form a uni 'orrn whole which has the same tensile strength in the longitudinal and transverse able, and the endless transport-cloth however be subjected to a uniform reciprocating movement, since with this alternative the essential object of this method viz. the crossed superposed helical winding .of the strips forming the seamless felt covering could also be obtained. Instead of the known cards giving a wide sliver, special cards giving in the first instance a band of sliver of the necessary width could be used.

It is obvious that the transport cloth and the rollers supporting same must be so arranged as to be capable of being suitably adjusted for the purpose of giving the felt covering to be formed the desired inner diameter according to the object to which it is to be applied.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. The process of manufacturing seamless felt tubes or bands, consisting in winding slivers of a width less than the length of the tube to be formed, upon an endless band in a plurality of layers, each layer being arranged obliquely with the convolutions having their edges contiguous, each layer of convolutions being Wound in a different oblique direction I to the contiguous layer; and thereupon cutto the contiguous layer; and thereupon finishing the tube by fulling.

2. The process of manufacturing seamless felt tubes or bands, consisting in Winding slivers of a Width less than the length of the tube to be formed, upon an endless band in a plurality of layers, each layer being arranged obliquely With the convolutions having their edges contiguous, each layer of convolutions being Wound in a different oblique direction ting off the uneven edges of the tube, and then fulling the tube.

In Witness whereof I have hereunto signed 15 my name this 19th day of August, 1905, in the presence of tWo subscribing Witnesses.

N IKQLAUS WAHL.

Witnesses JEAN GRUND, CARL GRUND. 

